Autolite 472 race plugs with thick electrode that was also cut back for the best spark is what I started out on as recommended by Precision Turbo. I went to regular 103's after getting tired of paying for $5 special order spark plugs that I had to replace regularly. Saw no loss in performance.
Stage II headed full weight car street driven regularly and raced even more often. Never burned a plug. Your results may vary!
